Butt gauge



Jan. 3, 1928.

I J. F. CARSTENS BUTT GAUGE Filed. April 9, 1924 2 Sheets-Sheet 1 lllljIn lilllillllllll llll!lllllllllllllIllllllflllllllllllllllilllllllilli aliiiiiiiiiiiihll'imiflllllljlmmm||mulllllnllllmlmu g 1 z :i- 10 j i I 'l INVENTOR ATTORNEY Jan. 3,1923. f 7 1,654,786

' J. F. CARSTENS BUTT- GAUQE Filed April 9, 1924 2 Sheets-Sheet 2 HEM/T 'arszens INVENTOR ATTORNEY Patented Jan. 3, 1928. I 1 A i i UNITED STATES PATENT OFFICE.

JOHN F. oAns'rnNs, OFSANTA'MONICA, CALII ORN IA. V

, e V i BUTT GAUGE.

Application filed April 9, 1924. Serial 1%. 705,365.

My inventinrelates to the practice of Figure 5, is a view in section seen on a scoring and routing out areas on doors, l1ne 5+5 of Figures. jambs and'the like, for the receipt of hinge F lgure 6, is also a view seen on the line butts, lock plates, strikes andthe like. 55 of Fig. 4, but showing the device as it 60 5 The invention has for its principal object would 'appear' attached to a jamb prepara the provision of a simple, readily adjusted tory to routing out for a strike. and accurate means for defining the rectan- Figure 7, is a view in bottom elevation of gular area to be worked upon, and for an improved tool for. use in conjunction with efficiently guiding the workm'ans chisel or the guage. 65 other instruments used. .Figure 8, is a view in vertical section Another object of the invention is to prothereof showing its operative relation to the vide an adjustable rectangular gauge for the gauge. c Y above described purpose, which is so con- Figure 9 is a View in front elevation of structecl and provided with suitable attachone end of a part 'hereinafterknown as the 70 ing means that it may be temporarily held front gauge bar. 1

in a contiguous position with regard to the More specifically, my improved gauge in surface'to be worked on, so that in using a the embodiment showncomprises essentially chisel, the danger of undercutting or work- .a front gauge bar 8, a back gauge bar '9, ing beyond the prescribed limits, is elimirectangular adjustable means 10, 10, and 75 nated. transverse members or bars 11, 11.

Another object of the invention is to pro- The front gauge bar in plan is of a width vide a gauge of the above described characcorresponding. to the standard distance at ter, which is adapted for use in working on which an edge ofv a hinge butt is spaced either a door or a jamb. I c I from the stop '12,,commonly found on door 30 Another object of the invention is to projambs 14. The rear bar is of a less commonvide a device of the above described characly used standard. of thickness. Both; bars ter and for the above described purposes, are interchangeable with one another and which may also be converted or be employed alike in all respects, except for thickness. in guiding the workmans toolsin the act Thebars are preferably ofa channel form 85 of routing out areas for the receipt of lock and are provided with a plurality of spaced plates, strikes and the like. f r elongated apertures 16. Screws 17, passing Another object of the invention is to prothrough said apertures into the members 10, vide means whereby such rectangular areas 10, hold "saidfmembers to said bar in admay be markedand routed out with greater justed relationship. Each ofthetransverse 90 speed and with greater accuracy than heremembers is detachably secured to the corretofore. r spon'ding adjustable member by screws 17',

Still other objects and advantages will while the rear gauge bar is attached jointly appear hereinafter. 1 to the ends of the transverse bars as by I have illustrated by the accompanying screws 18. It will beapparent'now that the 95 40 drawings a preferred embodimentof my inbars 8, 9, 11 and 11', all unite to define andvention, and in the said drawings, encompass a rectangular space 19, and all Figure 1, is a plan view of the said embars are capable of being disposed contigbodiment as it would appear attached to a 'uous with the surface,"rsuch as 20 of the jamb preparatory to routing out an area door 21; 100

for the receipt of a hinge butt. 1 Each of the adjacent memberslO is pro- Figure 2, is a view in section thereof seen vided with a verticalboss 22, centrally 10- on a line 2 2 of Fig. 1. cated, and through each .boss a vertical bore Figure 3, is a view in section seen on a 23 extende In each bore a wood screw 24: line 3-3v of Fig. 1, showing the embodiment is. fitted, and an extension to 'said screw 105 attached to the end of a door for guiding a passes upward through the bore'and termitool in the act of routing out an areafor nates in an enlarged end. Adjacent the the receipt of a hinge butt, lower end of the extension, slightl above the Figure 4, isa plan view of the embodiscrew portion, a ring 25 is presse onto proment adjusted and attached to the end of "vide a shoulder or stop. By means of a set 110 a door preparatoryto routing out an area screw 26 carried by the boss, and which is c 7 for the receipt of a lock plate or the like disposed to interfere-with the ring, the screw is held against being withdrawn accidently from the bore. I

One of the salient features of my inven-- tion resides in a shim 27 provided at each end of the front bar. In order to fasten the gauge to a surface of a door jamb or the like, it is properly positioned, and each screw head is driven slightly into the wood. Subsequent turning of the screws cause them to further embed themselves further in the wood and so draw the gauge forcibly down upon said surface. Thereby the gauge is quickly attached and is held securely in place while being used. Other suitable well known means may be employed for :temporarily attaching the gauge to a surface. The screws are simple in construction and op :eration and leave a comparatively small hole .in the surface which may be obscured by putty; just as all similar marks are obscured whena door or the like is being finished.

1n Figures -7 and 8, an improved router plane is shown which is particularly adapted for use in connection with my improved gauge. Said'plane includes .a base .30, which .carries a vertical boss 31, provided with a vertical bore '32. In said "bore a slidable stem 33 is fitted. The stem is provided with two flat sides 34 and 35, disposed at right angles to one another. A set screw 36 engages the flat side which is presented to it and precludes turning of the stem. The

lower end of the .stem protrudes from the smooth under surface '37 of the base and a common router-plane blade '38 .is attached thereto, .as by a screw 39. .An annular member 40, provides a revoluble extension to the boss, and said member is held to the boss by means of another annular member 41,

which engages a slot 42 in the member 40.

The .member is internally threaded, and

the upper portion .43 of the stem is accordingly lthreaded and screwed into said member. .N ow it will be apparent that when member 40 is rotated the stem cannot turn and will therefore be positively raised or lowered, as the case may be, in the boss. .Thus the blade is adjusted toward or away from the under surface of the base of the '50 plane.

Another of the salient features .of my invention resides in a stop 44, which is practically identical in outline with the "blade. As will be apparent hereinafter, this stop ..precludes any undercutting on the .part of the blades, and its comparatively thick edges L45 'coact with the inside margins 46 of the bars to limit the cutting stroke of the blade.

As to the general cooperation of my improved plane and; 'auge, it will beseen from reference 'to Fig. that the plane .may be greater than the depth of the bars. Thus the depth of the cut, allowed for the blade,

is determined. As the plane is operated in the manner :common -to such planes, that portion of the material which is encompassed by the gauge is gradually planed or shaved off and a particularly smooth, efficient and we'll defined depression is provided where the material is removed. l

When a door end is to be rented for a hinge butt (not shown), the sh im is turned downward so that surface 47, of portion 48 thereof,- abuts the face 459' of the door. "The rearbar isuh'eld, by the transverse bars, mu

away from the other surface .51 of the door, inasmuch as the area to be rented out for a hinge butt .mters'ects the said surface and the cutting edge of the bit begins its work immediately it strikes said surface.

The foregoing also ap 'o'lies to the act of routing out an area on a door 'jamb (see IFig. 2,), except for the changed position of the In this case the shim is turned so that its .major axis parallels the front bar and thereby adds to the effective thickness of the bar. Thus the inside surface of'the front bar is disposed away from the stop a distance slightly greater than the distance at which it is shown removed from thefacc of the door in Fig. 3. This is in confornr 1 .sh'ow'n'),-jor a strike (not shown), the itrans-g verse bars. are dispensed with. Now, in

the case ofa'Slock plate on "the end of ardooi,

the area to be rented out is indicatedby 5'5 v(see Fig. 4). In this case it will be seen that the routed area is disposed midway between the opp'osed faces of the door and does not intersect either edge. on the front gauge bar is turned down, (as :shown, so that the front "bar. extends over the adjacent edge of the doora lhis brings the rear bar flush with the other face of the door. Thereby thearea encompassed by the front bar, rear bar, and end members 10 is exactly midway of the opposed faces.

When the gauge is to be used on a jamb having jits usual stop, the shims are {turned to stand vertically, .so that the surface -5601 the shim only abuts the stop. -Thereby the location of the area encompassedby the gauge is midwayof the edge'5f8 of thestop, and the edge 59 0f the jamb. v

In either of the immediately foregoing case s the area encompassed by the bars and members l0, 10, may be routed out 'by the plane-in the following manner :-:,The blade is turned at right angles 'to the position in which it is shown in Fig. 8. It is adjusted so thatits cutting-edge will scrape the surface to which fitl'is applied 'be'fore'the under The shim suriace of'the plane will abut the top .sur-

faces of the gauge parts. 'Forward's'tr'okes 7 will send the cutter into one end of the area being Worked. Subsequent lowering of the blade is resorted to until that end of the area is cut to the required depth. The

plane is turned and worked in the opposite direction until the remainder of the material to beremoved has been planed out.

It will be seen now that I have provided a simple and readily adjusted gauge which may be arranged to define and correctly locate an area to be routed on a door end for the insertion of a hinge butt, an area on a j amb for the insertion of a hingesbutt, an area on a doors end for the insertionof a lock plate, and an area on a jan'ibfor the insertion of a strike. It will also be seen that my improved gauge prevents going beyond the prescribed limit and precludes under-cutting. The simple movable shim which I provide takes care of the correct location of the area to be. defined in all cases, and withal it will be seen that I have provided a simple and quickly adjusted gauge for defining any area to be routed and for carrying out all the objects set forth. Obviously, the gauge may be used in connection with a common chisel or any other suitable tool (not shown), and in such case under cutting is guarded against, because all under surfaces of the bars are contiguous with the surface being worked.

While I have shown a' specific construction and arrangement of parts, it has been done only by way of example in order that the features of my invention may be made clear to those skilled in the art, and I do not limit myself to any specific construction or arrangement of parts, and may alter the construction and arrangement of parts as I desire without enlarging the scope of my invention within the appended claims.

v I claim:

1. In combination, a gauge having a horizontal top surface and provldmg an opening defined by vertical inside margins, all 1 portions of the top surface being on a common horizontal plane; said gauge having a bottom surface adapted to be disposed con tiguously with a surface to be routed, and

a plane including a flat plate capable of bridging the opening, a horizontal cutting blade spaced below and carried by said plate; said blade having a forward cutting edge terminating at each side in sharp cut ting corners, and astop carried by said. plate above'said blade; said stop having a front and side abutment edges, respectively.

conforming in'outline to, and in vertical registration. with, the corresponding cutting edges and corners, respectively, of the blade; said blade vertically movable with regard to said plate to dispose the blade below the bottom surface of the gauge.

2. In combination, a gauge having a horizontal top surface and providing an opening defined by vertical inside margins; all portions of the top surface being on a common horizontal plane; said gauge having a bottom surface adapted to be disposed contiguously with a surface to be routed, and aplane including a flat plate capable of bridging the opening, a horizontal cutting blade spaced below and carried by said plate; said blade having a cutting edge, and a stop carried by said plate above said blade; said stop conforming in outline to, and in vertical registration 1 with, the-cutting edges of, the blade;'said blade vertically movable with regard to said plate to dispose the blade below the bottom surface of the gauge.

JOHN F. CARSTENS. 

